1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
swat32
4 years ago
14

A random sample of 40 college students has a mean earnings of​ $3120 over the summer months. Assume the population standard devi

ation of earnings over the summer months for college students is​ $677 and that the distribution of earnings over the summer months for college students is normally distributed. Determine whether a normal distribution or a​ t-distribution should be used or whether neither of these can be used to construct a confidence interval.
Mathematics
1 answer:
PSYCHO15rus [73]4 years ago
4 0

Answer:

A normal distribution or z-test is used to construct a confidence interval.

Step-by-step explanation:

We are given the following in the question:

Sample mean, \bar{x} = $3120

Sample size, n = 40

Population standard deviation, σ = $677

The distribution of earnings of college is a normal distribution.

Conditions:

  • Since we are given the population standard deviation and the the sample size is also greater than 30.

Conclusion:

Thus, we use a normal distribution or z-test to construct a confidence interval.

You might be interested in
Y=-x-5 graph this equation
sergejj [24]
Negative slope and shifted 5 down on the y axis with a root at x=-5
5 0
3 years ago
Meg is a veterinarian. In a given week, 50% of
neonofarm [45]
Meg would be a to be correct
7 0
3 years ago
Mr. Jenning's physics class built different-shaped parachutes to see which shapes were more effective. The students tested the p
grigory [225]

The mean increases by 1.5 because every value is increased by 1.5, take this example.
{1, 3, 7, 9} has a mean of 5.
Add 1 to each value.
{2, 4, 8, 10} has a mean of 6.

Standard Deviation generally stays the same despite the change in values, because of it's equation is based on the mean and data values and the distance between them in the end do not change if ALL values in a data set increase/decrease by the same number.

7 0
3 years ago
Read 2 more answers
Math help, please help thank you ! :)
Alexandra [31]

Answer:

construct a angle that has the same measure to ABC.

Step-by-step explanation:

congruent means the same amount.

6 0
4 years ago
What is one more than -5
Cerrena [4.2K]
All real numbers above -4
3 0
4 years ago
Read 2 more answers
Other questions:
  • What is a mother function
    10·1 answer
  • Explain two ways to find the sale price of an item marked 30% off
    13·2 answers
  • Define the word fraction
    13·2 answers
  • 9+a=23 what is the answer?
    9·2 answers
  • Please answer this question! 30 points and brainliest!
    7·1 answer
  • How do you say 19,034,600 in word form?​
    15·2 answers
  • Choose all the expression with a difference less than 5
    14·1 answer
  • Which expression is equivalent to (2x-3) (x+5
    9·2 answers
  • Josh is tiling his swimming pool. What information does Josh need?
    9·1 answer
  • Find the total amount and total interest after one year if the interest is compounded half yearly
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!